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Nysten's Rule
Nysten's rule (1811) describes the sequential onset of rigor mortis in the various muscle groups. The basic sequence of the solidifying body begins from the head down the body, in the order: * Involuntary muscle first: Heart * Upper eyelids * Neck * Jaw * Face * Upper extremities * Muscles of the trunk * Lower extremities The rule does not occur in all cases, as described. In particular, it depends on what muscle groups are even claimed before the death - there enters rigor mortis then first one.Madea/ Dettmeyer Basiswissen Rechtsmedizin, Springerverlag 2007, S. 73 It owes its name to the French pediatrician Pierre-Hubert Nysten Pierre-Hubert Nysten (30 October 1771 – 3 March 1818) was a French physiologist and pediatrician who was a native of Liège. Biography He studied medicine in Paris, and eventually became a professor at the École de Médecine in Paris. Sh ... (1771–1818). References {{Reflist Jason Payne-James, Anthony, Forensic Medicine: Clinical and Pathologi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rigor Mortis
Rigor mortis (Latin: ''rigor'' "stiffness", and ''mortis'' "of death"), or postmortem rigidity, is the third stage of death. It is one of the recognizable signs of death, characterized by stiffening of the limbs of the corpse caused by chemical changes in the muscles postmortem (mainly calcium).Saladin, K. S. 2010. ''Anatomy & Physiology'': 6th edition. McGraw-Hill. In humans, rigor mortis can occur as soon as four hours after death. Contrary to folklore and common belief, rigor mortis is not permanent and begins to pass within hours of onset. Typically, it lasts no longer than eight hours at "room temperature". Physiology After death, aerobic respiration in an organism ceases, depleting the source of oxygen used in the making of adenosine triphosphate (ATP). ATP is required to cause separation of the actin-myosin cross-bridges during relaxation of muscle.Hall, John E., and Arthur C. Guyton. Guyton and Hall Textbook of Medical Physiology. Philadelphia, PA: Saunders/Els ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscle
Skeletal muscles (commonly referred to as muscles) are Organ (biology), organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as Skeletal muscle#Skeletal muscle cells, muscle fibers. The muscle tissue of a skeletal muscle is striated muscle tissue, striated – having a striped appearance due to the arrangement of the sarcomeres. Skeletal muscles are voluntary muscles under the control of the somatic nervous system. The other types of muscle are cardiac muscle which is also striated and smooth muscle which is non-striated; both of these types of muscle tissue are classified as involuntary, or, under the control of the autonomic nervous system. A skeletal muscle contains multiple muscle fascicle, fascicles – bundles of muscle fibers. Each individual fiber, and each muscle is surrounded by a type of connective tissue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pediatrician
Pediatrics ( also spelled ''paediatrics'' or ''pædiatrics'') is the branch of medicine that involves the medical care of infants, children, adolescents, and young adults. In the United Kingdom, paediatrics covers many of their youth until the age of 18. The American Academy of Pediatrics recommends people seek pediatric care through the age of 21, but some pediatric subspecialists continue to care for adults up to 25. Worldwide age limits of pediatrics have been trending upward year after year. A medical doctor who specializes in this area is known as a pediatrician, or paediatrician. The word ''pediatrics'' and its cognates mean "healer of children," derived from the two Greek words: (''pais'' "child") and (''iatros'' "doctor, healer"). Pediatricians work in clinics, research centers, universities, general hospitals and children's hospitals, including those who practice pediatric subspecialties (e.g. neonatology requires resources available in a NICU). History The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pierre-Hubert Nysten
Pierre-Hubert Nysten (30 October 1771 – 3 March 1818) was a French physiologist and pediatrician who was a native of Liège. Biography He studied medicine in Paris, and eventually became a professor at the École de Médecine in Paris. Shortly before his death, he attained the position of ''médecin-chef'' at the Hospice des Enfants Assistés (children's hospital) in Paris. With Xavier Bichat (1771–1802), Nysten performed pioneer experiments in cardiology, including studies involving the effects of galvanic current on the heart. In 1805 he studied silkworm diseases in southern France, and provided an early description of polyhedrosis. He also described symptoms associated with albuminuria, and in 1811 provided a scientific description of rigor mortis. The eponymous " Nysten's Law" defines the progressive states of cadaveric rigidity during rigor mortis. Written works In 1810 with Joseph Capuron (1767–1850), he published the second edition of the ''Nouveau dictio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signs Of Death
Death is the irreversible cessation of all biological functions that sustain an organism. For organisms with a brain, death can also be defined as the irreversible cessation of functioning of the whole brain, including brainstem, and brain death is sometimes used as a legal definition of death. The remains of a former organism normally begin to decompose shortly after death. Death is an inevitable process that eventually occurs in almost all organisms. Death is generally applied to whole organisms; the similar process seen in individual components of an organism, such as cells or tissues, is necrosis. Something that is not considered an organism, such as a virus, can be physically destroyed but is not said to die. As of the early 21st century, over 150,000 humans die each day, with ageing being by far the most common cause of death. Many cultures and religions have the idea of an afterlife, and also may hold the idea of judgement of good and bad deeds in one's life (heave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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